Wood Polymer Composites Different types of Decking WPC Solid DeckingSize: 146mm*21mm WPC Solid DeckingSize: 140mm*25mm WPC Hollow DeckingSize: 100mm*25mm WPC Hollow DeckingSize: 135mm*25mm Different types of Joist WPC Solid JoistSize: 40mm*30mm WPC Hollow JoistSize: 40mm*30mm WPC Solid JoistSize: 40mm*30mm WPC Hollow JoistSize: 40mm*30mm Accessories